Here's an "antelope archery during rifle season" almost-horror story:
About 15 years ago I was getting within rifle range of a herd that had a nice buck in the middle of the group of about 20 antelope, and another buck about 50 yards outside the group.
I sat up, set up my bipod and put my scope on the buck that was just outside the herd. Something was off, wasn't sure what and then an archery hunter sits up and starts waving his hands - that 'buck' was a nearly full sized decoy. All it didn't have was lowest part of the legs. Whoever did the colors, nailed it!
Blood drained from my face thinking about what would have happened if I'd have shot at that 'buck' if the archery hunter hadn't seen me. He quickly packed up and trotted off towards the road, a few miles away.
I don't know if you have to wear orange using a 900 antelope tag during rifle season, but I highly recommend it!